Swivel joint for pipes



July l 1924.

J. W. BROWN, JR

SWIVEL JOINT FOR PIPES Filed June 24, 1921 WITNESSES:

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Patented July l, 19,24.

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SWIVEL JOINT FOR PIPES.

Appiieation med :une 2e, 1921. seriai No. 479,985.

To all whom t may concern:

Be it known that I JOHN WiLsoN BirowN, Jr., a citizen of the nitedStates, residing in Philadelphia, Pennsylvania, have .mvented a new andImproved Swivel Joint for Pipes, of which the following is aspecication. 0

The object of my invention is to provide a simple and .effective meansof connecting together two pipes containing uid under pressure one ofwhich pipes has a motion of rotation with respect to the other.

In the accompanying drawings; Fig. 1 is a longitudinal sectional view ofthe. pre ferred form of my improved swivel j oint Figs. 2, 3 and 4 arelongitudinal sectiona views of modifications of the same.

Referring to Fig. 1, N is a pipe, c is a tubular chamber connected to.said pipe, e e are bushings mounted in saidtubular chamber. Thesebushingsy `may be of any substance, but are preferablyof a somewhatelastic material possessing anti-friction properties such as woodimpregnatedwith grease. These are pressed into c with a pressure lessthan that whlch will be'exerted on their ends by the liquid in theannular .space 7c. By reason of the tightness of the fit between theexterior of the bushings e, e and the tubular chamber c, said bushingscannot revolve in said chamber and a liquid tight joint is made betweenthe exterior surface of said bushings and the wall of said chamber andthe only relative movement possible between the tubular chamber and thebushn s is the end movement of the latter due to tie pressure of theliquid in the annular s ace k. M is a pipe iittin rotatably in t ebushings e e and povide with anges a a which retain in position thebushings when forced outward by the liquid in space k. No attempt ismade to have the fit between the interior surfaces of the bushings e, eandthe exterior sul'- face of the pi .M. These flanges and the ends ofthe Ibiishings are fitted together so that when the bushings are pressedagainst the anges by the fluid in the space k there will be no leakage,at this point. Bushings e, e not only serve to prevent by theirtightness in tubular chamber c, leakage along the walls of said chamberand by their contact with the flanges a, a, caused by the pressure ofthe liquid in the annular space c, to prevent leakage along the faces ofthese anges, but they also serve to suprt the tubular chamber c and thepipe in their proper relation to one another said bushings beingthebearings in which said plpe revolves. j is an opening through thewall of `pipe M providing a assage for fluid from annular space lc to te bore of pipe M or vice versa. While the drawing shows ipe M as havinga bore which extends t roughout its length it will be understood thatfor the p se of my inventionvit 1s only necessary t at the bore coverthe openiii j and extend thence in one or the other irection. It will beunderstood that while the flanges a a are shown as integral with pipe Mthey may be secured thereto in any convenient manner.

Fi 2 shows a modication of my invention 1n which the tubular chamber c1is not bored strai ht through but has one end bored to' it pipe and itsend Z finished to coact with iange a so that the action of the fluid inspace lc is to force this end into contact with said flange preventinleakage at this point.

Fig. 3 shows a mo ifcation of my invention 1n which the bushings b bwhich correspond to the bushings e e do not depend on their size andelasticity for their fluidtight joint with chamber c but are providedwith cupped leathers for this urpose.

Fig. 4 shows a modification o my invention in which spring rings performthe function of the cupped leathers in Fig. 3. In all cases when inoperation the bushings do not rotate 'in the tubular chamber but aresuciently free in it to be forced outward by the liquid in space lcbeing at the same time so fitted that no leakage can take place betweenthe exterior of the bush-A ings and the interior of the tubular chamber,and the pipe Mi rotates in the bushings any Huid which ma enter betweenthe exterior of the pipe and the bore of the bushings being stopped bthe ends of the bushings, or, 1n case of ig. 2 the end of the bushingand the end of the tubular chamber bearin against the flanges a a. Itwill be seen t at by this construction the only moving surfaces whichrequire to be maitained in a duid-ti ht condition are under pressureforcing t em into contact and are provided with a continuous automaticadjustment for wear.

. I claim- 1. The combination of a pipe, a tubular chamber connected tosaid pi bushings adapted to slide'in said tubuli chamber,

a second pipe adapted to rotate in said bushings, flanges on said secondpipe against which the ends of said bushings are iorced by the pressureof the fluid in the tubular chamber and an opening through the Wall ofthe second pipe.

2. riihe combination of a pipe, a tubular chamber connected to said pipehaving a reduced portion, a bushing adapted to slide in said tubularchamber, a second pipe adapted to rotate in said bushing and saidtubular chamber, fianges on said second pipe against which the end ofsaid bushing;- and the end of the tubular chamber are forced by thepressure of the Huid in the tubular chamber and an opening through thewall of said second pipe.

3. rihe combination of a pipe, a tubular chamber connected to said pipe,bushings adapted to slide in said tubular chamber and forminglsupporting bearings for a second pipe adapted to rotate in saidbushings, anges on said second pipe against which the ends of saidbushin s are forced by the pressure of the dui in the tubular chamberand an opening through the Wali of the second ipe.

4. The com ination of a pipe, a tubular chamber connected to said pipehavin a reduced portion, a bushing adapted to side in said tubularchamber and forming one 0iI the supporting bearings for a second pipeadapted to rotate in said bushing and said tubular chamber, iianges onsaid second pipe against which the end of said bushin and the end of thetubular chamber are orced by the pressure of the fiuid in the tubularchamber and an opening in the wail of the second pipe.

JOHN WILSN BRWN, Jn.

